Fortunately the gatekeeper was very friendly and joked around and made me feel welcomed again. Was he targeting me because I'm not a teenage girl or not accompanied by a teenage girl? I felt insulted. Even after I went through the gate and had my ticket scanned, he followed me and 'checked' my ticket again. He checked my ticket again and again, asked me whether I was traveling alone, and went as far as asking me whether I was 'a big fan of Taylor Swift', in front of all of those people.
Before I went through the gate a security guard started to harass me.